Grip



Patented Nov. 17, 1925.

UNITED STATES PATENT OFFICE.

c emr.

Application led February To all @07mm t may concern.'

Be it known that I, JAMES P. RATIGAN, citizen of the United States, residing at Walnut Park, in the lcounty of Los Angeles and State of California, have invented a new and useful Grip, ofwhichthe following is a specification. j

This invention relates to grips of the type employed, for example, in the art relating to oil wells. This grip is capable of use in the connecting of the polish rod to the walking beam so as to effect operation of the pump, and it may also be employed in clamping the sucker rods in the operations of pulling and inserting said rods. The grip may be used for other purposes for which it is adapted. An object of the invention is to provide a grip of this character of great strength relative to the amount of metal employed in its construction.

Another object is to construct the grip so that tightening the grip upon-the member that is toV be clamped will not tend to spread the jaws and thus break the grip.

Various other objects and advantages will appear hereinafter.

Fig. 1 is a plan view of a grip constructed in accordance with the provisions of this i11- vention, a rod beingshown in the grip in section. j y Fig. 2 is a front elevation of Fig. 1, portions of the handle for operating one of the screws being broken away.

l Fig. 3 is a sectional elevation on the line indicated by 3-3,'Fig. 2.'

Fig. et is av fraginental sectional elevation on the line indicated ,by L -4, Fig. l.

Fig. 5 is a perspective view of one ofthe body sections.

.There is provided a body indicated in general by the character. The body is preferably triangular in cross section and preferably entirely surroundsthe rod a which is to be gripped. In the instance illustrated in the drawings, to obtain certain advantages the body 5 is of sectional construction, one of the vsections 6 being channeled and having longitudinally yextending shoulders 7 on opposite sides of the channel. The shoulders 7 constitute spaced aws which are movably engaged by the other section S; The jaws 7 are preferably hook-shaped, andthe channel or opening extending longitudinally in the section 6 is-indicated at 20. The section` 8 forms a wall that closes the open side ofthe 16, 1925. lserieu No. 9,508.

channel 20. The section 8 is provided with suitable clamping means which, in thisinstance is constituted by one or'more screws 9, 10, threaded through the section 6 and projecting into the channel and positioned at points along the longitudinal axis of said section 8. The inner ends yof the screws 9, 10 engage a loose block 11 which f is preferably provided with a longitudinally extending groove 12 to approximately fit a portion of the curved'face of the member that is being clamped in the grip. This member is indicatedl at a.

Preferably the section 8 and block 11 are held assembled by a tongue 13 projecting from the rear face of lthe block 11 through a slot 14 extending longitudinally in the section 8. Further insuranceagainst separation of the section 8 and block 11 is provided by a shoulder or shoulders .15 on .the tongue, the lateral extent vof saidshoulders being suicient to engage the rear face of the section 8 when the block is moved away from the section 8. Thus, the 'section 8 and block 11 arey loosely connected.

The inner faces of the jaws 7 preferably extend yaslant inwardly as indicated at 16 and said faces are engaged by projections 17 vantage, for it will beV seen that, when the screws 9, 10 are tightened to clamp the block 11 against the member a, the strain that comes upon Ythe jaws 7. tends to hold said jaws toward one another, thus tending j to prevent breakage of said jaws, under the immense vstrainy that results wheny the grip is employed for supporting a string vof sucker rods that may be tive or six thousand i feet in length.)

. The section' 6 is rovided at itslower end with shoulders 19 that project into the channel 20 so as to engage and support 'thev section 8 when the screws 9,10 are'V loosened, thus supporting the section `8 until said screws have been tightened to clamp the Block llragainst the 'member`a, the section 48 then being held tightly against ltheV jaws 7 by the reaction of thel screws 9,10.

In practice, the griv may beenoaged with the sucker rod by sli lingupwar lythesection 8, with its attached block 11, out of the channel 2O and moving the 'section G toward the rod that is to be clamped to cause the rod to be received in the bottom of the chanw nel 20. Then the section 8 with the attached block will be replaced in 'the channel 20 and the screws 9, 10 tightened against the block to press the block against the rod. The screw 10 may be tightened lirst and then the Iscrew 9, which is provided with a handle 21 to multiply the leverage for turning the screw 9, is tightened.

The wall ot` the groove 12 preferably is convex longitudinally of the block 1 1. The curvature is relatively slight and is 'somewhat exaggerated in Fig. 3 so that it may be seen clearly. The advantage ot this is that a wedging action is thereby obt-ained on the rod, for the screw 10 will be operated first to set the lower end of the block 1'1 fairly tight against the rod, and then the screw 9, by operation .ot the handle 2l, will rock the block 11 slightly on the rod, thus increasing the pressure ot the screw 10 against the block, and, in tact, equalizing the pressure ot the screws 9, 10.

The. front or inner tace 22 ot the body section 8 preferablyy is aslant inwardly and downwardly relative to the ribs 17, thus permitting the section 8 and block 11 to be easily inserted in the channel 2O after the rod a is in place in said channel.

To hold the sections 6,` 8 assembled when the block is released and it is desired to pick up the grip by the handle 21, a rotatable latch 23 is pivotally mounted at 2e on the upper tace of the body section 6 so that, when said latch is turned to latching position, it will proj-ect over the upper face ot the section 8 and retain said section against upward shitting and, when turned to retracted position, it will not thus project over the section 8, permitting said section to be slid out oft the channel 20.

A stopV is provided on the upper tace ot the section 8 for the latch to, engage when said latch is retracted so that the latch cannot be turned a greater distance than necessary to retract it trom latehing position.

I claim:

1. A grip comprising a body formed in sections,` one section being channeled and, the othe section forming a wall 'lor the open side, ofY the channel and being inovably secured tothe rst mentioned section, a screw threaded through one ot the sections and projecting into the channel, and cooperating partsbetween the sections tending to pull the side walls ofthev channeled member towardeaeh other whenthescrew is tightened.

T25 lilVv grip comprising a body *formedV in sectionsbfone sectionv "being channeled', and tliecothei; section formng a wallie-1* the Open sie@1 Qr- -rhe chan-asl andbeug lllovab'y cured to the first lineinsionedl section, a

ed through one ot the sections and projectv ing into the channel.

et. A grip comprising a channeled body, a grooved block in the channel, the wall of the groove being convex longitudinally of the block, means to force one Vvend of the block toward the wall of the channel, and means to torce theaother end of the block toward the wall of the channel.

5. A grip comprising a channeled body, a grooved block in the channel, the wall ot the groove being convex longitudinally ot the block, and screws threaded into the body, one screw engaging the block near one end and the other screw engaging the block near its opposite end.

6. A grip comprising a channeled body adapted to receive a rod, screws threaded into the body and projecting into the channel, and a block engaged at lits end portions by the screws and having a face engaging the rod only at a portion intermediate ot' the end portions to equalize pressure ot the screws on the block.

7. A grip comprising a body formed in sections, one section 'being channeled to receive arod, the other section having a longitudinally extending slot, a block having a tongue inserted in the slot, and means on one ot' the sections to torce the block toward the rod.

8. A grip comprising a body formed in sections, one section beineI channeled to receive a rod, the other section having a longitudinally extending slot, a block having a tongue inserted in the slot, there being a shoulder on the tongue to engage one ot the marginal walls of the slot, and means on one oi the sections to 'force the block toward the rod.

9. A grip, comprising a body termed in relatively movable sections, one ot the seetions having a channel to receive a rod, the other section closing the open side et the channel, one ot the sections having its inner face extending aslant downwardly and inwardly, a block in thechannel, and means on one et the sections to torce the block away from the slanting-ace toward'` the rod.

10i Agrip comprisinga body formed in relativelymovable` sections, one of the see# tio-ns havin-g a channel t'oreceive a red, the other section closing the opeir side of* the channel and in sliding engagement withthe first mentioned section, one of the sections having its inner face extending aslant downwardly and inwardly, a block in the channel, and means on one of the sections to force the block away from. the slanting face t0- ward the rod.

l1. A grip comprising a channeled section having its side walls terminating in inf wardiy projecting hook-shaped jaws, the inner faces of the bights of the jaws extending asiant inwardly, a second section extending between the jaws and having projections to engage in the bights of the jaws, the inner faces of said projections being aslant inwardly to engage the slanting jaw faces, and means on one of the sections to force a rod within the channel toward the other section.

Signed at Los Angeles, California this 9 day of February 1925.

JAMES P. RATIGAN. 

